In this Saturday, July 28, 2018 photo, Jairo Bonilla, leader of the April 19 student movement, wears a T-shirt with text that reads in Spanish "We are not criminals," during an interview with the Associated Press in Managua, Nicaragua. The Inter-American Commission on Human Rights has said its monitoring team in Nicaragua found that "Nicaraguan authorities made numerous arbitrary detentions involving the use of force." (AP Photo/Arnulfo Franco)

In this July 27, 2018 photo, a university student who did not want to be identified for fear of reprisals from the government shows his scars, the product of surgery to extract a bullet from his shoulder, in Managua, Nicaragua. According to the non-governmental Nicaraguan Human Rights Center, 400 "political prisoners" are believed to still be held in jails, prisons and police stations across the country. (AP Photo/Arnulfo Franco)

In this July 24, 2018 photo, flyers of missing persons cover a wall inside the Nicaraguan Center for Human Rights, in Managua, Nicaragua. The flyers represent part of at least 400 missing persons arrested in Nicaragua in nearly four months of unrest and subsequent crackdown, according to investigation by the center. (AP Photo/Arnulfo Franco)

In this July 25, 2018 photo, Maria Jose Malespin shows a photograph of her missing son Lester Lenin Mayorga Malespin, who was detained at a police checkpoint on the outskirts of the Caribbean city of Bluefields, in Managua, Nicaragua. For three weeks the he was held without seeing a judge or being able to speak to his family. Malespin and her daughter-in-law flew to Bluefields to look for him only to find out after the fact that he had been transferred to Managua's notorious El Chipote jail. Finally on Aug. 1, he was released with no explanation. (AP Photo/Arnulfo Franco)

FILE - In this July 14, 2018 file photo, students who had taken refuge at the Jesus of Divine Mercy church amid a barrage of armed attacks, arrive on a bus to the Metropolitan cathedral, in Managua, Nicaragua. When paramilitaries attacked the campus in mid-July nearly 200 students were driven out under heavy fire and took refuge at the church. The attack left two people dead. (AP Photo/Cristobal Venegas)

FILE- In this June 30, 2018 file photo, hundreds of thousands participate in a demonstration called the "March of the Flowers" remembering the children killed during the last two-months violence, in Managua, Nicaragua. The current unrest in Nicaragua began in April, when President Daniel Ortega imposed cuts to the social security system and small protests by senior citizens were violently broken up. The protests spread and university students quickly became the vanguard of a push to oust the president who has ruled for the past decade. (AP Photo/Alfredo Zuniga, File)

In this July 24, 2018 photo, Vilma Nunez, president of Nicaraguan Center for Human Rights talks on a phone, at her office in Managua, Nicaragua. "Right now, without exaggerating, Nicaragua is a prison," said Nunez. She called Ortega's systematic search for those involved in the unrest a "human hunt." (AP Photo/Arnulfo Franco)

In this July 23, 2018 photo, plywood with graffiti depicting the last names of Nicaraguan President Daniel Ortega and his wife and Vice President Rosario Murillo with swastikas, is stenciled behind broken glass at the main entrance of the Jesuit run Universidad Centroamericana, in Managua, Nicaragua. Last week, the Inter-American Commission on Human Rights said its monitoring team in Nicaragua found that "Nicaraguan authorities made numerous arbitrary detentions involving the use of force." (AP Photo/Arnulfo Franco)

FILE- In this July 18, 2018 file photo, heavily armed pro-government militia occupy the Monimbo neighborhood of Masaya, Nicaragua. President Daniel Ortega for weeks has denied that paramilitary squads and Sandinista youth groups that have clashed with or attacked protesters were working with the police, but when asked in a recent television interview how members of the opposition picked up by masked paramilitaries end up in jails, Ortega said: "we have volunteer police who cooperate with the police. (AP Photo/Alfredo Zuniga, File)

In this July 25, 2018 photo, a group of women visit the main entrance of El Chipote detention center in Managua, Nicaragua. Two-dozen hardcore Sandinistas followers have been posted there for weeks to intimidate families trying to get news of their relatives. The detention center has been notorious for more than 50 years, serving to the previous Somoza regime, the Sandinista revolutionary government in the 1980's and now the government President Daniel Ortega. (AP Photo/Arnulfo Franco)

FILe - In this May 26, 2018 file photo, the Spanish word for "Murderer" covers a mural of Nicaragua's President Daniel Ortega, as part of anti-government protests demanding his resignation in Managua, Nicaragua. Ortega has dismissed the Organization of American States as a tool of the U.S. government and accused protesters and opponents of trying to stage a coup. (AP Photo/Esteban Felix, File)

In this July 25, 2018 photo, a graffiti that that reads in Spanish "We demand justice" is written on a wall outside El Chipote detention center in Managua, Nicaragua. Many of those detained during the recent protests and clashes against the government of President Daniel Ortega have been interned in El Chipote. (AP Photo/Arnulfo Franco)